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https://issues.apache.org/jira/browse/HBASE-9792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13806904#comment-13806904
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Jimmy Xiang commented on HBASE-9792:
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As to the offline-related changes, it is to handle crashed region servers while
regions are in transition, in which case a region could be assigned and master
doesn't know about it yet.
> Region states should update last assignments when a region is opened.
> ---------------------------------------------------------------------
>
> Key: HBASE-9792
> URL: https://issues.apache.org/jira/browse/HBASE-9792
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: trunk-9792.patch, trunk-9792_v2.patch,
> trunk-9792_v3.patch
>
>
> Currently, we update a region's last assignment region server when the region
> is online. We should do this sooner, when the region is moved to OPEN state.
> CM could kill this region server before we delete the znode and online the
> region.
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